Here is the full list of all 51 Dead Space 2 (DE) trophies - there are 43 bronze, 4 silver, 3 gold and 1 platinum.
Knock down an enemy with Contact Beam Alt-Fire then kill it with Primary Fire before it stands up
Kill a Necromorph with every Weapon in the game (single player only).
Complete the Solar Array Puzzle
Defeat the AI
Collect 10 Semiconductors
Find the Peng treasure
Kill 50 Necromorphs while they are in Stasis (single player only)
Kill a Brute without taking damage
Win the fight at the School
Collect 10 Schematics
Kill a Stalker with the Seeker Rifle while in Zoom Mode
Kill a Cyst by catching its Mine and throwing it back
Kill the Tormenter
Kill 6 enemies at once with Line Gun's Alt-Fire (single player only)
Sever all three tentacles of a Lurker with one Line Gun Primary Fire shot (single player only)
Survive your first encounter with Stalkers
Impale an enemy into a Decompression Window to cause it to blow out
Get through the first Zero-G area
Stomp 10 Containers
Dismember the Lightspeed Boy Statue
Survive the Train Sequence
Use Quick Heal ten times (single player only)
Get your first Suit
TK Impale a live Slasher to a surface using a Slasher's arm - it must stick to the surface
Dismember 25 Necromorph Limbs (single player only)
Earn all Trophies in Dead Space™ 2 - DE
Knock off every Tripod during the Elevator Sequence
Destroy the Tripod Nest
Snare the Shard with the Ishimura
Complete the Drill Ride
Destroy the Marker
Escape the Facility
Survive the Eye Poke Machine
Complete the game on any difficulty setting
Complete the game on Zealot setting
Decompress 20 Necromorphs without getting sucked out yourself
Kill 25 crawling enemies with Stomp (single player only)
Kill 30 Necromorphs with Kinesis objects
Kill 30 Crawlers without detonating them
Dismember 2,500 Necromorph Limbs (single player only)
Purchase the Advanced Suit
Upgrade your RIG and Stasis completely
Upgrade 1 Weapon completely
Simultaneously have four completely upgraded weapons
Collect 100 logs
Impale an enemy with the Javelin Gun and use its Alt-Fire to shock 3 others (single player only)
Kill 4 enemies with the same Ripper blade
Kill 20 enemies with Detonator Mines in a deployed state
Kill 50 enemies using the Flamethrower
Impale an enemy and make him fly through the air for 17 meters - it must stick to the surface
Complete the game on Hard Core setting